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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






2. Contains and regulates the temp of the testes for sperm production






3. ~60 days before calving






4. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






5. Check feet and legs - look for masculine traits in build such as crest and muscling






6. 1. brain function - 2. blood flow - 3. willing female






7. Superior genes are _______ to multiply






8. Way to know everything is alright with the breeding male






9. Check feet and legs - look for masculine traits in build such as crest and muscling






10. 1-2 days






11. (switzerland) 2nd in size and milk production - most muscle -






12. (LH) stimulates the Leydig cells to produce testosterone






13. Help to signal hormone levels which we need both in the brain right next to each other.






14. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






15. Important 'landmark' during palpation






16. Help to signal hormone levels which we need both in the brain right next to each other.






17. What about the sperm for a bull which has been castrated but still has testicles?






18. Contains and regulates the temp of the testes for sperm production






19. 147 days






20. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






21. 24 hours before end of estrus cycle






22. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






23. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






24. Sperm production






25. 19-23 (21) days






26. Allows extension of penis without fibro-elastic penis






27. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






28. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






29. Luteolysis happens because of the ____________ hormone






30. Duct through penis that carries sperm and urine






31. Start of the reproductive tract for the female. located outside of the body






32. Birthing process (termination of gestation)






33. The more stressed out the male is - the less sperm he is going to produce






34. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






35. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






36. 19-23 (21) days






37. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






38. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






39. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






40. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






41. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






42. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






43. 45-60 days after breeding; re-breed as required






44. Days which have increasing daylight hours

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45. Animals which have many estrous periods per year (ex: cow - sow)






46. Can survive ~7 days in cow. vast majority <48 hours






47. (FSH) causes egg to mature in females






48. ~60 days before calving






49. Why does estrus happen before ovulation?






50. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells